DME-to-hydrocarbon over an MFI zeolite: product selectivity controlled by oxygenates under the kinetic regime

Carlos Ortega (Corresponding author), Gunther Kolb

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The influence of process variables on the DME-to-hydrocarbon (DtH) conversion has been assessed. The reaction was studied at atmospheric pressure, over an MFI zeolite (H-ZSM-5, SiO2/Al2O3 = 58), in a gradientless recycle reactor, under the kinetic regime, and process variables in the range of 598-648 K and space time in the range of 0.008-0.040 h kgcat kgDME -1. The results showed that DME and methanol are not in equilibrium, that the cis-/trans-C4 olefins are in equilibrium with each other but not with the 1-butene, while C5 + hydrocarbons are favored at high oxygenates conversion. Finally, it was observed for the first time, to best of the knowledge of the current authors, that under kinetically controlled conditions, the selectivity to main groups of products can be described by the oxygenates conversion (xoxy), independently of the process conditions, which means that the xoxy controls the process selectivity independently of reaction temperature and space time.

Original languageEnglish
Pages (from-to)22893-22904
Number of pages12
JournalIndustrial and Engineering Chemistry Research
Volume58
Issue number51
DOIs
Publication statusPublished - 26 Dec 2019

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